William a



y mma gaat pero anni.

" Wittmann; Lieutenant, 'or NEW Youn',- NYY.

l i LettersfPtent o. 105,817, dcted'fuly 26, 1870.

`11i/Pao'vrai/mur 1N PIPE-courantes.

The Schedule referred to in these Letters Patent and :making partof the same.

To all whom nuty concern: l l `Be it known that I, WILLIAM A, LIGHTHALL, of the city, county, and State of New York, have invented a `new and improved SlipJoint', for steam and 'exhaust-pipes for steam-engines'and similar articles; and

I dohereby declare that thefollowing is a full andV exactgdescription'of the saine, reference being had to s `the accompanying drawing and to the letters ofv referenee marked thereon, in which-#- Figure l fis a broken half section, and,

Figure 2, a. transverse'section. y

Theobject andpurpose of my invention consists in making a slip-joint for steam and exhaust-pipes and'other similar' articles, which is made' by providing an `India-rubber sleeve,rto cover and connect the pipes `to which it may beattached, in such manner as t0v allow the said pipes `to move. by expansion and con traction, without disturbing the jointor to produce a `leakage in the same, when `the same lis combined with an interior metal sleeve, placed within the pipes at their connecting points, `to preventthe pressure from within, in case ot' interior pressure, and the pressure from without, in ease exterior pressure, from af'- ifecting the out-erImlia-rubbcr sleeve,as` described;

i and also, by a 'further combination of the aforenalned elements with an outer metal sleeve,iplaced upon and put over the rubber sleeve, to effect the purposes hereinaftcr named. y l

A and A are the two connecting-pipes, which are .separated to asufiicient distance to allow for any expansion and contraction that may occur in their use. B is aninterior metal' sleeve, which is made to tit `the bore ot" the connecting-pipes, and of such length as tof cover the spaces between thc connecting-,pipes at theirmaximum expansion;

41t may be desirable to .secure this interior sleeve, at one end, to the interior of the connecting-pipe-,topre vent it movin gfrom position, through the alternate ex-y pansions and contractions of the`connectingpipes, but yet this is not deemed a matter of necessity, but only of safety. i

U is the rubber sleeve, which is slipped over t-he Yends of the connecting-pipes, and securedin place by the bauds D D'.

This sleeve ismade of sufficient thickness vto resist the pressure of steam from the interior of the pipes, when applied to steam-pipes, or to resist the pressure of the atmosphere, wherpused for vacuum-pipes.

E is au outer metal sleeve, placed4 over. and upon the rubber sleeve C, between the bands D D', for the purpose of resisting the uuduepressure outward of the rubber sleeve,V when the pipes are connected and used as steam-pipes. The natural elasticity ofthe rubber sleeve will allow it to expand and contract with the expansion and contraction of the pipes to which it is-attached`,'and

also to allow 4of any lateral motion in the pipes to which they 4may be'subjected, making the same, in combination with thev sleeves'nained, the cheapest and most perfect slip-joint, forthe purposes described, that has yet been devised.

lVhat I vclaim as my invention, and desire to secure by Letters Patent, is-

1. The combination ofthe pipes AA with the rubber jv. 

